/* Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "jerryscript.h"
#include "jerryscript-ext/debugger.h"
#include "jerryscript-ext/handler.h"
#include "jerryscript-port.h"
#include "jerryscript-port-default.h"

#include "cli.h"

/**
 * Maximum size of source code
 */
#define JERRY_BUFFER_SIZE (1048576)

/**
 * Maximum size of snapshots buffer
 */
#define JERRY_SNAPSHOT_BUFFER_SIZE (JERRY_BUFFER_SIZE / sizeof(uint32_t))

/**
 * Standalone Jerry exit codes
 */
#define JERRY_STANDALONE_EXIT_CODE_OK (0)
#define JERRY_STANDALONE_EXIT_CODE_FAIL (1)

/**
 * Context size of the SYNTAX_ERROR
 */
#define SYNTAX_ERROR_CONTEXT_SIZE 2

static uint8_t buffer[JERRY_BUFFER_SIZE];

static const uint32_t* read_file(const char* file_name, size_t* out_size_p) {
  if (file_name == NULL) {
    jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: failed to open file, missing filename\n");
    return NULL;
  }

  FILE* file;
  if (!strcmp("-", file_name)) {
    file = stdin;
  } else {
    file = fopen(file_name, "rb");
    if (file == NULL) {
      jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: failed to open file: %s\n", file_name);
      return NULL;
    }
  }

  size_t bytes_read = fread(buffer, 1u, sizeof(buffer), file);
  if (!bytes_read) {
    jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: failed to read file: %s\n", file_name);
    fclose(file);
    return NULL;
  }

  fclose(file);

  *out_size_p = bytes_read;
  return (const uint32_t*)buffer;
} /* read_file */

/**
 * Print error value
 */
static void print_unhandled_exception(jerry_value_t error_value) /**< error value */
{
  assert(!jerry_value_is_error(error_value));

  jerry_char_t err_str_buf[256];

  if (jerry_value_is_object(error_value)) {
    jerry_value_t stack_str = jerry_create_string((const jerry_char_t*)"stack");
    jerry_value_t backtrace_val = jerry_get_property(error_value, stack_str);
    jerry_release_value(stack_str);

    if (!jerry_value_is_error(backtrace_val) && jerry_value_is_array(backtrace_val)) {
      printf("Exception backtrace:\n");

      uint32_t length = jerry_get_array_length(backtrace_val);

      /* This length should be enough. */
      if (length > 32) {
        length = 32;
      }

      for (uint32_t i = 0; i < length; i++) {
        jerry_value_t item_val = jerry_get_property_by_index(backtrace_val, i);

        if (!jerry_value_is_error(item_val) && jerry_value_is_string(item_val)) {
          jerry_size_t str_size = jerry_get_utf8_string_size(item_val);

          if (str_size >= 256) {
            printf("%3u: [Backtrace string too long]\n", i);
          } else {
            jerry_size_t string_end =
                jerry_string_to_utf8_char_buffer(item_val, err_str_buf, str_size);
            assert(string_end == str_size);
            err_str_buf[string_end] = 0;

            printf("%3u: %s\n", i, err_str_buf);
          }
        }

        jerry_release_value(item_val);
      }
    }
    jerry_release_value(backtrace_val);
  }

  jerry_value_t err_str_val = jerry_value_to_string(error_value);
  jerry_size_t err_str_size = jerry_get_utf8_string_size(err_str_val);

  if (err_str_size >= 256) {
    const char msg[] = "[Error message too long]";
    err_str_size = sizeof(msg) / sizeof(char) - 1;
    memcpy(err_str_buf, msg, err_str_size + 1);
  } else {
    jerry_size_t string_end =
        jerry_string_to_utf8_char_buffer(err_str_val, err_str_buf, err_str_size);
    assert(string_end == err_str_size);
    err_str_buf[string_end] = 0;

    if (jerry_is_feature_enabled(JERRY_FEATURE_ERROR_MESSAGES) &&
        jerry_get_error_type(error_value) == JERRY_ERROR_SYNTAX) {
      jerry_char_t* string_end_p = err_str_buf + string_end;
      unsigned int err_line = 0;
      unsigned int err_col = 0;
      char* path_str_p = NULL;
      char* path_str_end_p = NULL;

      /* 1. parse column and line information */
      for (jerry_char_t* current_p = err_str_buf; current_p < string_end_p; current_p++) {
        if (*current_p == '[') {
          current_p++;

          if (*current_p == '<') {
            break;
          }

          path_str_p = (char*)current_p;
          while (current_p < string_end_p && *current_p != ':') {
            current_p++;
          }

          path_str_end_p = (char*)current_p++;

          err_line = (unsigned int)strtol((char*)current_p, (char**)&current_p, 10);

          current_p++;

          err_col = (unsigned int)strtol((char*)current_p, NULL, 10);
          break;
        }
      } /* for */

      if (err_line != 0 && err_col != 0) {
        unsigned int curr_line = 1;

        bool is_printing_context = false;
        unsigned int pos = 0;

        size_t source_size;

        /* Temporarily modify the error message, so we can use the path. */
        *path_str_end_p = '\0';

        read_file(path_str_p, &source_size);

        /* Revert the error message. */
        *path_str_end_p = ':';

        /* 2. seek and print */
        while ((pos < source_size) && (buffer[pos] != '\0')) {
          if (buffer[pos] == '\n') {
            curr_line++;
          }

          if (err_line < SYNTAX_ERROR_CONTEXT_SIZE ||
              (err_line >= curr_line && (err_line - curr_line) <= SYNTAX_ERROR_CONTEXT_SIZE)) {
            /* context must be printed */
            is_printing_context = true;
          }

          if (curr_line > err_line) {
            break;
          }

          if (is_printing_context) {
            jerry_port_log(JERRY_LOG_LEVEL_ERROR, "%c", buffer[pos]);
          }

          pos++;
        }

        jerry_port_log(JERRY_LOG_LEVEL_ERROR, "\n");

        while (--err_col) {
          jerry_port_log(JERRY_LOG_LEVEL_ERROR, "~");
        }

        jerry_port_log(JERRY_LOG_LEVEL_ERROR, "^\n");
      }
    }
  }

  jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Script Error: %s\n", err_str_buf);
  jerry_release_value(err_str_val);
} /* print_unhandled_exception */

/**
 * Register a JavaScript function in the global object.
 */
static void register_js_function(const char* name_p,                 /**< name of the function */
                                 jerry_external_handler_t handler_p) /**< function callback */
{
  jerry_value_t result_val = jerryx_handler_register_global((const jerry_char_t*)name_p, handler_p);

  if (jerry_value_is_error(result_val)) {
    jerry_port_log(JERRY_LOG_LEVEL_WARNING, "Warning: failed to register '%s' method.", name_p);
    result_val = jerry_get_value_from_error(result_val, true);
    print_unhandled_exception(result_val);
  }

  jerry_release_value(result_val);
} /* register_js_function */

/**
 * Runs the source code received by jerry_debugger_wait_for_client_source.
 *
 * @return result fo the source code execution
 */
static jerry_value_t wait_for_source_callback(
    const jerry_char_t* resource_name_p, /**< resource name */
    size_t resource_name_size,           /**< size of resource name */
    const jerry_char_t* source_p,        /**< source code */
    size_t source_size,                  /**< source code size */
    void* user_p)                        /**< user pointer */
{
  (void)user_p; /* unused */
  jerry_value_t ret_val =
      jerry_parse(resource_name_p, resource_name_size, source_p, source_size, JERRY_PARSE_NO_OPTS);

  if (!jerry_value_is_error(ret_val)) {
    jerry_value_t func_val = ret_val;
    ret_val = jerry_run(func_val);
    jerry_release_value(func_val);
  }

  return ret_val;
} /* wait_for_source_callback */

/**
 * Command line option IDs
 */
typedef enum {
  OPT_HELP,
  OPT_VERSION,
  OPT_MEM_STATS,
  OPT_PARSE_ONLY,
  OPT_SHOW_OP,
  OPT_SHOW_RE_OP,
  OPT_DEBUG_SERVER,
  OPT_DEBUG_PORT,
  OPT_DEBUG_CHANNEL,
  OPT_DEBUG_PROTOCOL,
  OPT_DEBUG_SERIAL_CONFIG,
  OPT_DEBUGGER_WAIT_SOURCE,
  OPT_EXEC_SNAP,
  OPT_EXEC_SNAP_FUNC,
  OPT_LOG_LEVEL,
  OPT_NO_PROMPT,
  OPT_CALL_ON_EXIT
} main_opt_id_t;

/**
 * Command line options
 */
static const cli_opt_t main_opts[] = {
    CLI_OPT_DEF(.id = OPT_HELP, .opt = "h", .longopt = "help", .help = "print this help and exit"),
    CLI_OPT_DEF(.id = OPT_VERSION, .opt = "v", .longopt = "version",
                .help = "print tool and library version and exit"),
    CLI_OPT_DEF(.id = OPT_MEM_STATS, .longopt = "mem-stats", .help = "dump memory statistics"),
    CLI_OPT_DEF(.id = OPT_PARSE_ONLY, .longopt = "parse-only", .help = "don't execute JS input"),
    CLI_OPT_DEF(.id = OPT_SHOW_OP, .longopt = "show-opcodes", .help = "dump parser byte-code"),
    CLI_OPT_DEF(.id = OPT_SHOW_RE_OP, .longopt = "show-regexp-opcodes",
                .help = "dump regexp byte-code"),
    CLI_OPT_DEF(.id = OPT_DEBUG_SERVER, .longopt = "start-debug-server",
                .help = "start debug server and wait for a connecting client"),
    CLI_OPT_DEF(.id = OPT_DEBUG_PORT, .longopt = "debug-port", .meta = "NUM",
                .help = "debug server port (default: 5001)"),
    CLI_OPT_DEF(.id = OPT_DEBUG_CHANNEL, .longopt = "debug-channel",
                .meta = "[websocket|rawpacket]",
                .help = "Specify the debugger transmission channel (default: websocket)"),
    CLI_OPT_DEF(.id = OPT_DEBUG_PROTOCOL, .longopt = "debug-protocol", .meta = "PROTOCOL",
                .help = "Specify the transmission protocol over the communication channel "
                        "(tcp|serial, default: tcp)"),
    CLI_OPT_DEF(.id = OPT_DEBUG_SERIAL_CONFIG, .longopt = "serial-config", .meta = "OPTIONS_STRING",
                .help = "Configure parameters for serial port (default: /dev/ttyS0,115200,8,N,1)"),
    CLI_OPT_DEF(.id = OPT_DEBUGGER_WAIT_SOURCE, .longopt = "debugger-wait-source",
                .help = "wait for an executable source from the client"),
    CLI_OPT_DEF(.id = OPT_EXEC_SNAP, .longopt = "exec-snapshot", .meta = "FILE",
                .help = "execute input snapshot file(s)"),
    CLI_OPT_DEF(.id = OPT_EXEC_SNAP_FUNC, .longopt = "exec-snapshot-func", .meta = "FILE NUM",
                .help = "execute specific function from input snapshot file(s)"),
    CLI_OPT_DEF(.id = OPT_LOG_LEVEL, .longopt = "log-level", .meta = "NUM",
                .help = "set log level (0-3)"),
    CLI_OPT_DEF(.id = OPT_NO_PROMPT, .longopt = "no-prompt",
                .help = "don't print prompt in REPL mode"),
    CLI_OPT_DEF(.id = OPT_CALL_ON_EXIT, .longopt = "call-on-exit", .meta = "STRING",
                .help = "invoke the specified function when the process is just about to exit"),
    CLI_OPT_DEF(.id = CLI_OPT_DEFAULT, .meta = "FILE",
                .help = "input JS file(s) (If file is -, read standard input.)")};

/**
 * Check whether JerryScript has a requested feature enabled or not. If not,
 * print a warning message.
 *
 * @return the status of the feature.
 */
static bool check_feature(jerry_feature_t feature, /**< feature to check */
                          const char* option) /**< command line option that triggered this check */
{
  if (!jerry_is_feature_enabled(feature)) {
    jerry_port_default_set_log_level(JERRY_LOG_LEVEL_WARNING);
    jerry_port_log(JERRY_LOG_LEVEL_WARNING,
                   "Ignoring '%s' option because this feature is disabled!\n", option);
    return false;
  }
  return true;
} /* check_feature */

/**
 * Check whether a usage-related condition holds. If not, print an error
 * message, print the usage, and terminate the application.
 */
static void check_usage(bool condition,   /**< the condition that must hold */
                        const char* name, /**< name of the application (argv[0]) */
                        const char* msg,  /**< error message to print if condition does not hold */
                        const char* opt)  /**< optional part of the error message */
{
  if (!condition) {
    jerry_port_log(JERRY_LOG_LEVEL_ERROR, "%s: %s%s\n", name, msg, opt != NULL ? opt : "");
    exit(JERRY_STANDALONE_EXIT_CODE_FAIL);
  }
} /* check_usage */

#if defined(JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1)

/**
 * The alloc function passed to jerry_create_context
 */
static void* context_alloc(size_t size, void* cb_data_p) {
  (void)cb_data_p; /* unused */
  return malloc(size);
} /* context_alloc */

#endif /* defined (JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1) */

/**
 * Inits the engine and the debugger
 */
static void init_engine(jerry_init_flag_t flags,   /**< initialized flags for the engine */
                        char* debug_channel,       /**< enable the debugger init or not */
                        char* debug_protocol,      /**< enable the debugger init or not */
                        uint16_t debug_port,       /**< the debugger port for tcp protocol */
                        char* debug_serial_config) /**< configuration string for serial protocol */
{
  jerry_init(flags);
  register_js_function("assert", jerryx_handler_assert);
  register_js_function("gc", jerryx_handler_gc);
  register_js_function("print", jerryx_handler_print);
} /* init_engine */

#define JERRY_COMMIT_HASH ""
int main(int argc, char** argv) {
  union {
    double d;
    unsigned u;
  } now = {.d = jerry_port_get_current_time()};
  srand(now.u);
  JERRY_VLA(const char*, file_names, argc);
  int files_counter = 0;

  jerry_init_flag_t flags = JERRY_INIT_EMPTY;

  JERRY_VLA(const char*, exec_snapshot_file_names, argc);
  JERRY_VLA(uint32_t, exec_snapshot_file_indices, argc);
  int exec_snapshots_count = 0;

  bool is_parse_only = false;

  bool start_debug_server = false;
  uint16_t debug_port = 5001;
  char* debug_channel = "websocket";
  char* debug_protocol = "tcp";
  char* debug_serial_config = "/dev/ttyS0,115200,8,N,1";

  bool is_repl_mode = false;
  bool is_wait_mode = false;
  bool no_prompt = false;

  const char* exit_cb = NULL;

  cli_state_t cli_state = cli_init(main_opts, argc - 1, argv + 1);
  for (int id = cli_consume_option(&cli_state); id != CLI_OPT_END;
       id = cli_consume_option(&cli_state)) {
    switch (id) {
      case OPT_HELP: {
        cli_help(argv[0], NULL, main_opts);
        return JERRY_STANDALONE_EXIT_CODE_OK;
      }
      case OPT_VERSION: {
        printf("Version: %d.%d.%d%s\n", JERRY_API_MAJOR_VERSION, JERRY_API_MINOR_VERSION,
               JERRY_API_PATCH_VERSION, JERRY_COMMIT_HASH);
        return JERRY_STANDALONE_EXIT_CODE_OK;
      }
      case OPT_MEM_STATS: {
        if (check_feature(JERRY_FEATURE_MEM_STATS, cli_state.arg)) {
          jerry_port_default_set_log_level(JERRY_LOG_LEVEL_DEBUG);
          flags |= JERRY_INIT_MEM_STATS;
        }
        break;
      }
      case OPT_PARSE_ONLY: {
        is_parse_only = true;
        break;
      }
      case OPT_SHOW_OP: {
        if (check_feature(JERRY_FEATURE_PARSER_DUMP, cli_state.arg)) {
          jerry_port_default_set_log_level(JERRY_LOG_LEVEL_DEBUG);
          flags |= JERRY_INIT_SHOW_OPCODES;
        }
        break;
      }
      case OPT_CALL_ON_EXIT: {
        exit_cb = cli_consume_string(&cli_state);
        break;
      }
      case OPT_SHOW_RE_OP: {
        if (check_feature(JERRY_FEATURE_REGEXP_DUMP, cli_state.arg)) {
          jerry_port_default_set_log_level(JERRY_LOG_LEVEL_DEBUG);
          flags |= JERRY_INIT_SHOW_REGEXP_OPCODES;
        }
        break;
      }
      case OPT_DEBUG_SERVER: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          start_debug_server = true;
        }
        break;
      }
      case OPT_DEBUG_PORT: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          debug_port = (uint16_t)cli_consume_int(&cli_state);
        }
        break;
      }
      case OPT_DEBUG_CHANNEL: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          debug_channel = (char*)cli_consume_string(&cli_state);
          check_usage(!strcmp(debug_channel, "websocket") || !strcmp(debug_channel, "rawpacket"),
                      argv[0], "Error: invalid value for --debug-channel: ", cli_state.arg);
        }
        break;
      }
      case OPT_DEBUG_PROTOCOL: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          debug_protocol = (char*)cli_consume_string(&cli_state);
          check_usage(!strcmp(debug_protocol, "tcp") || !strcmp(debug_protocol, "serial"), argv[0],
                      "Error: invalid value for --debug-protocol: ", cli_state.arg);
        }
        break;
      }
      case OPT_DEBUG_SERIAL_CONFIG: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          debug_serial_config = (char*)cli_consume_string(&cli_state);
        }
        break;
      }
      case OPT_DEBUGGER_WAIT_SOURCE: {
        if (check_feature(JERRY_FEATURE_DEBUGGER, cli_state.arg)) {
          is_wait_mode = true;
        }
        break;
      }
      case OPT_EXEC_SNAP: {
        if (check_feature(JERRY_FEATURE_SNAPSHOT_EXEC, cli_state.arg)) {
          exec_snapshot_file_names[exec_snapshots_count] = cli_consume_string(&cli_state);
          exec_snapshot_file_indices[exec_snapshots_count++] = 0;
        } else {
          cli_consume_string(&cli_state);
        }
        break;
      }
      case OPT_EXEC_SNAP_FUNC: {
        if (check_feature(JERRY_FEATURE_SNAPSHOT_EXEC, cli_state.arg)) {
          exec_snapshot_file_names[exec_snapshots_count] = cli_consume_string(&cli_state);
          exec_snapshot_file_indices[exec_snapshots_count++] =
              (uint32_t)cli_consume_int(&cli_state);
        } else {
          cli_consume_string(&cli_state);
        }
        break;
      }
      case OPT_LOG_LEVEL: {
        long int log_level = cli_consume_int(&cli_state);
        check_usage(log_level >= 0 && log_level <= 3, argv[0],
                    "Error: invalid value for --log-level: ", cli_state.arg);

        jerry_port_default_set_log_level((jerry_log_level_t)log_level);
        break;
      }
      case OPT_NO_PROMPT: {
        no_prompt = true;
        break;
      }
      case CLI_OPT_DEFAULT: {
        file_names[files_counter++] = cli_consume_string(&cli_state);
        break;
      }
      default: {
        cli_state.error = "Internal error";
        break;
      }
    }
  }

  if (cli_state.error != NULL) {
    if (cli_state.arg != NULL) {
      jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: %s %s\n", cli_state.error, cli_state.arg);
    } else {
      jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: %s\n", cli_state.error);
    }

    return JERRY_STANDALONE_EXIT_CODE_FAIL;
  }

  if (files_counter == 0 && exec_snapshots_count == 0) {
    is_repl_mode = true;
  }

#if defined(JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1)

  jerry_context_t* context_p =
      jerry_create_context(JERRY_GLOBAL_HEAP_SIZE * 1024, context_alloc, NULL);
  jerry_port_default_set_current_context(context_p);

#endif /* defined (JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1) */

  if (!start_debug_server) {
    debug_channel = "";
  }

  init_engine(flags, debug_channel, debug_protocol, debug_port, debug_serial_config);

  jerry_value_t ret_value = jerry_create_undefined();

  if (jerry_is_feature_enabled(JERRY_FEATURE_SNAPSHOT_EXEC)) {
    for (int i = 0; i < exec_snapshots_count; i++) {
      size_t snapshot_size;
      const uint32_t* snapshot_p = read_file(exec_snapshot_file_names[i], &snapshot_size);

      if (snapshot_p == NULL) {
        ret_value =
            jerry_create_error(JERRY_ERROR_COMMON, (jerry_char_t*)"Snapshot file load error");
      } else {
        ret_value = jerry_exec_snapshot(snapshot_p, snapshot_size, exec_snapshot_file_indices[i],
                                        JERRY_SNAPSHOT_EXEC_COPY_DATA);
      }

      if (jerry_value_is_error(ret_value)) {
        break;
      }
    }
  }

  while (true) {
    if (!jerry_value_is_error(ret_value)) {
      for (int i = 0; i < files_counter; i++) {
        size_t source_size;
        const jerry_char_t* source_p = (jerry_char_t*)read_file(file_names[i], &source_size);

        if (source_p == NULL) {
          ret_value =
              jerry_create_error(JERRY_ERROR_COMMON, (jerry_char_t*)"Source file load error");
          break;
        }

        if (!jerry_is_valid_utf8_string(source_p, (jerry_size_t)source_size)) {
          ret_value = jerry_create_error(JERRY_ERROR_COMMON,
                                         (jerry_char_t*)("Input must be a valid UTF-8 string."));
          break;
        }

        ret_value = jerry_parse((jerry_char_t*)file_names[i], strlen(file_names[i]), source_p,
                                source_size, JERRY_PARSE_NO_OPTS);

        if (!jerry_value_is_error(ret_value) && !is_parse_only) {
          jerry_value_t func_val = ret_value;
          ret_value = jerry_run(func_val);
          jerry_release_value(func_val);
        }

        if (jerry_value_is_error(ret_value)) {
          break;
        }

        jerry_release_value(ret_value);
        ret_value = jerry_create_undefined();
      }
    }

    if (is_wait_mode) {
      is_repl_mode = false;

      if (jerry_is_feature_enabled(JERRY_FEATURE_DEBUGGER)) {
        while (true) {
          jerry_debugger_wait_for_source_status_t receive_status;

          do {
            jerry_value_t run_result;

            receive_status =
                jerry_debugger_wait_for_client_source(wait_for_source_callback, NULL, &run_result);

            if (receive_status == JERRY_DEBUGGER_SOURCE_RECEIVE_FAILED) {
              ret_value = jerry_create_error(
                  JERRY_ERROR_COMMON, (jerry_char_t*)"Connection aborted before source arrived.");
            }

            if (receive_status == JERRY_DEBUGGER_SOURCE_END) {
              jerry_port_log(JERRY_LOG_LEVEL_DEBUG, "No more client source.\n");
            }

            if (jerry_value_is_abort(run_result)) {
              ret_value = jerry_acquire_value(run_result);
            }

            jerry_release_value(run_result);
          } while (receive_status == JERRY_DEBUGGER_SOURCE_RECEIVED);

          if (receive_status != JERRY_DEBUGGER_CONTEXT_RESET_RECEIVED) {
            break;
          }

          init_engine(flags, debug_channel, debug_protocol, debug_port, debug_serial_config);

          ret_value = jerry_create_undefined();
        }
      }
    }

    bool restart = false;

    if (jerry_is_feature_enabled(JERRY_FEATURE_DEBUGGER) && jerry_value_is_abort(ret_value)) {
      jerry_value_t abort_value = jerry_get_value_from_error(ret_value, false);
      if (jerry_value_is_string(abort_value)) {
        static const char restart_str[] = "r353t";

        jerry_value_t str_val = jerry_value_to_string(abort_value);
        jerry_size_t str_size = jerry_get_string_size(str_val);

        if (str_size == sizeof(restart_str) - 1) {
          JERRY_VLA(jerry_char_t, str_buf, str_size);
          jerry_string_to_char_buffer(str_val, str_buf, str_size);
          if (memcmp(restart_str, (char*)(str_buf), str_size) == 0) {
            jerry_release_value(ret_value);
            restart = true;
          }
        }

        jerry_release_value(str_val);
      }

      jerry_release_value(abort_value);
    }

    if (!restart) {
      break;
    }

    jerry_cleanup();

    init_engine(flags, debug_channel, debug_protocol, debug_port, debug_serial_config);

    ret_value = jerry_create_undefined();
  }

  if (is_repl_mode) {
    const char* prompt = !no_prompt ? "jerry> " : "";
    bool is_done = false;

    while (!is_done) {
      uint8_t* source_buffer_tail = buffer;
      size_t len = 0;

      printf("%s", prompt);

      /* Read a line */
      while (true) {
        if (fread(source_buffer_tail, 1, 1, stdin) != 1) {
          is_done = true;
          break;
        }
        if (*source_buffer_tail == '\n') {
          break;
        }
        source_buffer_tail++;
        len++;
      }
      *source_buffer_tail = 0;

      if (len > 0) {
        if (!jerry_is_valid_utf8_string(buffer, (jerry_size_t)len)) {
          jerry_port_log(JERRY_LOG_LEVEL_ERROR, "Error: Input must be a valid UTF-8 string.\n");
          return JERRY_STANDALONE_EXIT_CODE_FAIL;
        }

        /* Evaluate the line */
        jerry_value_t ret_val = jerry_parse(NULL, 0, buffer, len, JERRY_PARSE_NO_OPTS);

        if (!jerry_value_is_error(ret_val)) {
          jerry_value_t func_val = ret_val;
          ret_val = jerry_run(func_val);
          jerry_release_value(func_val);
        }

        if (!jerry_value_is_error(ret_val)) {
          /* Print return value */
          const jerry_value_t args[] = {ret_val};
          jerry_value_t ret_val_print =
              jerryx_handler_print(jerry_create_undefined(), jerry_create_undefined(), args, 1);
          jerry_release_value(ret_val_print);
          jerry_release_value(ret_val);
          ret_val = jerry_run_all_enqueued_jobs();

          if (jerry_value_is_error(ret_val)) {
            ret_val = jerry_get_value_from_error(ret_val, true);
            print_unhandled_exception(ret_val);
          }
        } else {
          ret_val = jerry_get_value_from_error(ret_val, true);
          print_unhandled_exception(ret_val);
        }

        jerry_release_value(ret_val);
      }
    }
  }

  int ret_code = JERRY_STANDALONE_EXIT_CODE_OK;

  if (jerry_value_is_error(ret_value)) {
    ret_value = jerry_get_value_from_error(ret_value, true);
    print_unhandled_exception(ret_value);

    ret_code = JERRY_STANDALONE_EXIT_CODE_FAIL;
  }

  jerry_release_value(ret_value);

  ret_value = jerry_run_all_enqueued_jobs();

  if (jerry_value_is_error(ret_value)) {
    ret_value = jerry_get_value_from_error(ret_value, true);
    print_unhandled_exception(ret_value);
    ret_code = JERRY_STANDALONE_EXIT_CODE_FAIL;
  }

  jerry_release_value(ret_value);

  if (exit_cb != NULL) {
    jerry_value_t global = jerry_get_global_object();
    jerry_value_t fn_str = jerry_create_string((jerry_char_t*)exit_cb);
    jerry_value_t callback_fn = jerry_get_property(global, fn_str);

    jerry_release_value(global);
    jerry_release_value(fn_str);

    if (jerry_value_is_function(callback_fn)) {
      jerry_value_t ret_val = jerry_call_function(callback_fn, jerry_create_undefined(), NULL, 0);

      if (jerry_value_is_error(ret_val)) {
        ret_val = jerry_get_value_from_error(ret_val, true);
        print_unhandled_exception(ret_val);
        ret_code = JERRY_STANDALONE_EXIT_CODE_FAIL;
      }

      jerry_release_value(ret_val);
    }

    jerry_release_value(callback_fn);
  }

  jerry_cleanup();
#if defined(JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1)
  free(context_p);
#endif /* defined (JERRY_EXTERNAL_CONTEXT) && (JERRY_EXTERNAL_CONTEXT == 1) */
  return ret_code;
} /* main */
